Knob attachment



(Model.)

B. L. PHIPPS. Knob Attachment.

Patented May 3,1881.

No. wsg.

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N. PETERS, Pholo-Lithographen Washingtun. D. C.

UNITED STATES PATENT OFFICE.

EDWARD L. PHIPPS, OF MILFORD, MICHIGAN.

KNOB ATTACH MENT.

SPECIFICATION forming part of Letters Patent No. 241,059, dated May 3,1881.

Application filed January 8, 1881.

To all whom it may concern Be it known that I, EDWARD L. PHIPPs, ofMilford, in the county of Oakland and State of Michigan, have inventedan Improvement in Knob Attachments to Mortise Door-Latches, of which thefollowing is a specification.

The nature of this invention relates to certain new and usefulimprovements in the construction of knob attachments to looks orlatches; and the invention consists in the peculiar construction of theknob-shaft and its combination with devices by means of which thelatchmay be operated by or released from the operation of the knobs andshaft, as more fully hereinafter described.

In the drawings, Figure 1 is a longitudinal vertical central section ofmy improved device. Fig. 2 is an elevation of the shaft with one knobremoved and showing the sleeve. Fi 3 is an end elevation of theremovable knob, showing the square recess therein.

In the accompanying drawings, which form a part of this specification, Arepresents the shaft or spindle, to which the knob A is secured, in theusual manner. This spindle is square, as shown, one-half its length, andis reduced at its center, as shown at (0, whereby a shoulder, b, isformed. That portion of the spindle extending from such squared part isround, as shown at c, as far as the threaded portion (1, which,in turn,is squared, leaving the threads projecting upon each corner.

B is a square slide,the exterior area of which is the same size as themortise in the hub of the latch. Theinncr area of this slideisa triflelarger than the spindle, which latter will turn freely in the hub whenthe slideis withdrawn. The slide is provided with a thumb-piece orhandle,f.which projects outwardly through a slot, 0, in the shank d ofthe removable knob 0. As this thumb-piece projects outside ofthe rose Dit may be forced inward or withdrawn at pleasure. The threaded end ofthe spindle is inserted through the knob O, the outer face of which isprovided with a rectangular and deeply-sunken recess, 0, within whichthere is. placed a similarly-shaped washer, g, which slips (Model) ontothe squared end of the spindle and prevents the knob from turning on theshaft. A socket-nut, E, provided with a flange-head, h, to cover therecess, is then screwed onto the end of the spindle. The aperturethrough the bottom of the recess 6 is threaded to engage with thethreaded end of the spindle, and the only use of the flanged nut is toretain the washer in place and hide therecessin theknob.

I have described my invention in one of its forms of application only;but I do not desire to confine myself to the exact construction as aboveset forth, as it is evident that the spindle may be reduced its entirelength, so that it will freely turn within the hub of the latch or lock,except when the slide is inserted, which then fills the mortise in thehub and causes the latch to operate.

In practice the slide is forced inward when it is desired to have theturning of the knob operate the latch, and retracted or withdrawn whenit is desired that the latch shall not be operated.

What I claim as my invention is 1. In combination with a knob interiorlythreaded, and with an eXteriorly-thrcaded spindle which is squared atthe engaging end, as described, a rectangular recess in the outer faceof said knob and a similarly-shaped washer, substantially as set forth.

2. In combination with the knob O, provided with a rectangular recess,e,and with a spindle and rectangular washer, as described, the flanged nutE,substantially as and for the purposes specified.

3. In combination with the spindle A, con-' structed so that it willfreely turn within the hub of the lock through which it passes, and madepartly round and partly square, as shown, a slide, 15, upon saidspindle, which engages with the hub of the lock, substantially as andfor the purposes described.

EDWARD L. PHIPPS.

Witnesses:

H. S. SPRAGUE, A. BARTHEL.

